19 August 2009 Phase-induced amplitude apodization (PIAA) coronagraph testing at the High Contrast Imaging Testbed
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We present the current status of our testing of a phase-induced amplitude apodization (PIAA) coronagraph at the Jet Propulsion Lab's High Contrast Imaging Testbed (HCIT) vacuum facilities. These PIAA optics were designed to produce a point-spread function containing a region whose intensity is below 10-9 over a 20-percent fractional bandpass, comparable to the requirements for direct imaging of exoplanets from space. The results presented here show contrast levels of 4×10-7 in monochromatic light, with an inner working angle of 2.4 λ/D. The instrumentation is described here, as well as the testing procedures, wavefront control, and results.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brian Kern, Brian Kern, Ruslan Belikov, Ruslan Belikov, Amir Give'on, Amir Give'on, Olivier Guyon, Olivier Guyon, Andreas Kuhnert, Andreas Kuhnert, Marie B. Levine-West, Marie B. Levine-West, Ian C. McMichael, Ian C. McMichael, Dwight C. Moody, Dwight C. Moody, Albert F. Niessner, Albert F. Niessner, Laurent Pueyo, Laurent Pueyo, Stuart B. Shaklan, Stuart B. Shaklan, Wesley A. Traub, Wesley A. Traub, John T. Trauger, John T. Trauger, } "Phase-induced amplitude apodization (PIAA) coronagraph testing at the High Contrast Imaging Testbed", Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74400H (19 August 2009); doi: 10.1117/12.826988; https://doi.org/10.1117/12.826988

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